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# Wh-moved PP

Like NP complements, PP complements can be extracted to form wh-questions, as in sentence ((204)).
(203)0(203
(204)
[To which dog]i did Beth Ann throw the frisbee ?

As can be seen in the tree in Figure 14.5, extraction of PP complements is very similar to extraction of NP complements from the same positions.

{Ditransitive with PP with PP extraction tree: $\alpha$pW2nx0Vnx1pnx2

The PP extraction trees differ from NP extraction trees in having a PP rather than an NP left daughter node under Sq and in having the fill a PP rather than an NP position in the VP. In other respects these PP extraction structures behave like the NP extractions, including being used for topicalization.

XTAG Project
http://www.cis.upenn.edu/~xtag